QUADTREE 3D Tiles only render without gaps when geometricError is set extremely high

3D Tiles
1

I’m debugging a custom 3D Tiles 1.1 QUADTREE tileset in CesiumJS that shows visible gaps/holes unless the geometricError values are set extremely high.

This is a custom-generated tileset (not Cesium ion output) using:

  • 3DTILES_bounding_volume_S2

  • QUADTREE implicit tiling

  • .glb content

  • .subtree files

  • REPLACE refinement

The configuration that renders best so far has:

  • top-level geometricError: 99999999

  • root geometricError: 99999999

  • child geometricError: 99999999

Screenshot 2026-09-01 090839
Screenshot 2026-09-01 0908391385×702 205 KB

I also tested by commenting out my custom CesiumJS tileset viewer settings, and the gap behavior was basically unchanged, so this seems more like a tileset-generation / hierarchy / geometricError issue than a viewer-setting issue.

Questions:

  1. Is needing extremely large geometricError values a sign something is wrong in the tileset hierarchy?

  2. For an implicit QUADTREE tileset like this, what would a more reasonable geometricError setup look like?